Malicious PDF — malware analysis report

Static analysis result for SHA-256 32559ca1c3f3ed65…

MALICIOUS

PDF

88.8 KB Created: 2021-07-16 09:24:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4f50359e1d1ff77017687254656a07bd SHA-1: 88a82d3d85b9e3bd02053532682fcc3d274fec55 SHA-256: 32559ca1c3f3ed652f48968e21e1de3488e0cf299375de96ad7aadd796162c9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and UTM parameters suggests a coordinated effort to lure victims through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://synerhu.ru/uplcv?utm_term=girlfriend+keeps+breaking+up+and+getting+back+together PDF link annotation
    • http://frangarcia.eu/upload/file/fumelevufetinogo.pdfIn PDF document text
    • http://toyteepee.com/uploadfiles/file/210629231627818545m1gcmm.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/n55etmr2mgnhrg7vpsm3ht6145/22349913690.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b2070a981eb---xajejomerixanusekim.pdfIn PDF document text
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/992da1fff7a319afd5140bcb7c1258af/tulevezi.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/85822896734.pdfIn PDF document text
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087a657efc99---mawitinezaferoxewasaxegu.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160842f8674432---korokesunelupekuve.pdfIn PDF document text
    • http://pajurioverslas.lt/ckfinder/userfiles/files/57117782436.pdfIn PDF document text
    • http://teenaramainc.org/clients/875997/File/zudodatepawuwisil.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/79edd7c0eb6888a482685a11f92a696b/vupuri.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607de75040a2d---depitedonijubizipulovi.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609403ae4c1f2---sipemitukarikebisuwuku.pdfIn PDF document text
    • http://cupta.org/userfiles/files/20210612202132.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/36ec3486758cf798dcd1211381b1a9cc/xusasozunamoxojixa.pdfIn PDF document text
    • http://prochem.vn/images/uploads/files/97739244501.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-7-6/20210706195506155597.pdfIn PDF document text
    • https://cncostruzioni.com/userfiles/file/97924362300.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/50173881515.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f0e445245---53905512.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc1e5601bd---xunojusokolu.pdfIn PDF document text
    • http://truhlarstvisollner.cz/data/file/78159484863.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9df81553f---xupapozufazizudinebume.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/526b12ca612296e6ee34d4c1d7d0a802/61223326756.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/48438555407.pdfIn PDF document text
    • https://wecareprogram.org/images/file/62644531823.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5D 11268 bytes
SHA-256: e8088fff766909d2fafb696fb7a6ec26b5d4d590a4a147be616e4bec86164855
font_02_sfnt_off0001284f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284F 16576 bytes
SHA-256: c3bd83a418884e1405f7d58ff8ac2d87d8bbf1317ef9a7b0ff75a707e4e71572

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